Electrical fuse.



H. W. YOUNG.

ELECTRICAL FUSE.

APPucATfoN man MAR. 25. 1914.

1,165,563. I E v Patented Dec. 28, 1915.

oniran srnrns PATENT OFFICE.

ELECTRGL FUSE.

Application filed March 255, 1911i.

To all iff/mm may concern: lle it known that liiiuii' nl. toons, a

citizen ci the llnited States, and a resident oi the city of Chicago,county oi Cool;a and State oi' illinois, have invented certain new '11in icc diti'erent capacities from that for which the reference to theaccompanying drawing" forming a part of this specication and in which,

Figure l is a side View of fuse emoodying my invention, Fig. 2, an nlView oi the same, Fig. 3, a View of the opposite end, Fig. 4, alongitudinal section of the inse member, and Fig. 5, a section taken online 5 of Fig. fl, n

The preferred forni ci? construction as illustrated in the drawingcomprises an outer tube G ofinsulating material closed at one end bymeans of a metallic can T and provided at its o tber end with a metallicsleeve 8 projecting slightly beyond the end of the tube. The cap 7 andsleeve 8 serve as means for eiiecting electrical connection with theline terminals in the usual mannen inner tube 9 'oiE asbestos and liquidglassor other insulating material is removably' fitted within tube 6 andis closed at one end by means of plug 'i0 of porcelain, or other readilyrangible insulatingnaateriiil which is cemented or cast in said tube.The head l@ is "provided with a' central conical dovetail recess 'il anda conical metallic contact member l2 is arranged in said recess andsecured therein by a wall of cement i3, the arrangement being such thatupon withdrawal of :member i2 the wedging action thereof w'll fracturethe head l0 so to prevent re-use of the inner tube A nietallic plate leis imprisoned between responding end of tube 6 and can T and carries eninwardly projecting pin i5 i'itting the corresponding socket in head 10dcoince-tion of Letters Patent. I

Patented nenes, 1915.

Serial No. 827,68.

and a securing screw i6 is swiveled between plate le and the end of cap"Y in position to engage threads in contact member l2 and ell'ect thefracture of head 10 when tightcned.

i fuse wire 17 is soldered at one end to contact member 1Q and at itsother end to a fiat metallic strip i8 whichis provided with a backHardly turned cuter end 19 passing through. a notch 20 in the protrudingend et sleeve S and resting against the outer side or" said sleeve, asshown `in Fig. 4. e. closing disk 2l is fitted within the outer end ofsleeve 8 and is provided on one side with a tongue Q2 fitting within asuitable opening in the correspondingportion of sleeve 8 and on itsopposite side with an angularly turned u e 23 passing through notcliQOand oif'erlying end i9 of the fusible member. A spring member 24 issecured to the outer side of disk 2l and is singularly turned tooverhang tongue and carries a swiveled hinding screw 25 adapted tosecure the adjacent parte together, tongue 23 beingr provided with anopening and sleeve 8 with a registering threaded opening, and end 19with a notch for this purpose, as will be readily understood.

Screw 25 is secured in position by forining an opening: through springmember 2e and upsetting the edges or" said openingr to enlarge thesaine. Screw 25 is provided with a groove 27 adiacent its head and ispassed through said enlarged opening., whereupon the edges of theopening are again upset into said groove, thus effecting a swiveledconnection with said screw. By this arrangement it will be observed thatthe end of the fusible member may be readily secured so to eiect goodelectrical contact with sleeve 8 and, that screw 25 may be swung to andfrom operative position to facilitate suchl connection, but can never bedisplaced or lost ithout breaking spring member 21. lo aiord furtherprotection, if desired, inner tube 9 may be filled with any of the usualforms oi insu-- lating powders, as will be readily rinden stood.

In use outer casing 6 is furnished in pern marient form and inner'casings 9 are supplied to replace any destroyed by overloading orotherwise. lililien an inner casing is inserted in an outer casing, thescrew i@ is engaged with the socket l2 and tightenc/d to effect goodelectrical Contact wit screw 16 the plug` 10 is necessarily ruptured andivill fall apart upon removal from the casing 9. l

ivi-1n@ r have illustrated ma described" the preferred form ofconstruction for carrying my invention into effect, this is capable ofvariation and modification Without departing1 from the spirit of theinvention. I, therefore, do not Wish to be limited to the precisedetails of construction set' forth, but desire to. avail myself of suchvariations 'and modifications as come Within the scope of the appendedclaims.

Having described my invention what l claim as new and desire to secureby Letters Patent is:

.1. An' electric fusev comprising` agy fusible member provided withmeans lfor securing each end-'inr circuit, the means at one end being ofadestruetible nature; and means for securingl said fusible member incircuit and destroying' said destructible securing means,` substantiallyas described.-

electric fuse comprising a fusible member provided With means forsecuring each fend in circuit, the means at one end beine; of a destmifAle nature; and means for securine" said rlv'ble member in circuit andsin'iultaneously7 destroying said destructible means, substantially asdescribed.

3. An electric fuse comprising a casing; a frangible head at one end ofsaid casing; a 'threaded contact member embedded in said head and largerat its inner than at its outer end; a fusible member connected at oneend with said contact member and provided at its other end with meansfor connecting it in circuit; and a screw con tact member engaging saidthreaded contact member, substantially as described.

fl. ,lu electric fuse comprisingI an outer tube of insulating` material;a metallic cap closing; one end of said tube; a screw swiveled in saidcap and extending into said tube; an inner tube of insulating' materialfitting Within said outer tube; a frangible head closing one end of saidinner tube; a wedge shaped metallic Contact member embedded in said headand porvided with a threaded socket adapted to receive said screw; afusible member in said inner tubej;

'and connected at one end with said Wedge shaped Contact; and means foreffecting electrical contact With the other end of fusible member,ysubstantially as described ln testimony whereof l have signe/duly nameto this specification in the presence el two sub. cribingwvitnesses; l

HARRY W YOUNG.

Vtituesses:

Josiane. lt. ll. Porre, HELEN l LrLLIs1 il l)

